Hi Fix-kun, to get rid of this issue, you can simply remap the keyboard shortcut for the "ParentDirectory" "Ctrl+Shift+Backspace" as follows:

Close the Opera, and go to the Opera's profile (find the path in: O-Menu>About Opera>Paths>Profile), Open the "Preferences" file in your text editor, and edit it as below: { "Keybindings": { "Basic": { "ParentDirectory": [ "Ctrl+Shift+Backspace" ] }, "Settings": { "AdvancedEnabled": true } }, Save the changes, relaunch the Opera.